Howdy, I don't know if it's electrical or something but my jeep won't switch gears when I drive it. Stays in first and that's it, it doesn't switch gear. I don't know what's the problem I looked all over to see but can't figure it out. Some one message me and give me some input.

 

Does that year have a TPS? I know when I unplugged mine to try and bi-pass it, the trans wouldn't shift out of first